any wiring with emt tips?

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Old 04-24-05, 05:16 PM
latuszek
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any wiring with emt tips?

What's the best place (web site/book) to learn about the most efficient and effective ways of running emt conduit. (i live in chicago and it is required all new wiring be in "thin wall pipe")
 
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Old 04-25-05, 03:55 AM
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I don't think you can learn that by reading a book... it's usually a judgement call on what's the best way to wire a particular scenario. If you ask 3 different electricians you'll probably get three different wiring scenarios.

It somewhat of an art working with EMT.. I've been an electrician for 5 years and my EMT skills are still nowhere near "perfect". But then again, art has never been my strong point.
 
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Old 04-25-05, 06:14 AM
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Go to someplace like a Home Depot or an automotive garage where there is exposed conduit. Take a look at how it is fastened, bent, secured to walls, etc. Once you know how it is supposed to look you'll start having ideas how to do it. It should look neat, plumb and level, but there are also functional aspects of the installation that may not be apparent to you, so while you're at HD, thumb through their wiring books and see if there are sections on conduit installation. Also look at the various types of fittings, elbows, and conduit fasteners. There's even a chance that you'll find a knowledgable sales clerk who will have the time to explain what some of the gizmos are and what they're used for.

Get yourself a pipe bender. They come in different sizes so make sure the size conduit you'll be using. Residential is usually 1/2", sometimes 3/4" though. And get a Rigid tubing cutter, rather than cutting pieces with a hack saw. You are required to use the reamer to smooth out the interior of the conduit before pulling conductors through it. Be prepared waste a lot of conduit when first attempting to bend anything more complicated than a 90 degree elbow.

I recommend compression style connectors rather than set-screw type. Especially if outdoors, but I use them indoors too.

Good luck.

Juice
 
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Old 04-25-05, 07:36 AM
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Another thing you can do it visit a local construction site ( Commercial ) who may be running some EMT. Ask the local electrician if he would be willing to show you a few pointers in bending 90's, Offsets, 45's and so on.

I know on one large commercial job someone did that and came to one of my guys who sent him to me and we had a little sit down session on bending which turned into a big session with all the guys....I learned why we were going through so much pipe.....lol.....they needed a lesson themselves...lol

Anyway you will be shocked to see how many job site guys will help you if you go ask them.......might want to supply your own EMT...lol
 
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Old 04-25-05, 08:48 AM
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Don't depend upon the conduit to provide a good ground. Always run a ground wire.
 
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Old 04-25-05, 11:06 AM
latuszek
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Thanks for the great responses. I guess running the conduit will take some creativity no matter how much i research before hand.

One of my biggest questions is how to run conduit perpendicular to joists. an electrician told me that you basically can't run it through the joists. so i guess the only other option is to run as much as possible in the unfinished part of the basement, and whatever else runs perpendicular to joists where i am finishing, has to be run under the joists and i have to frame it in.
 
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Old 04-26-05, 06:05 AM
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I do not know if the NEC prohibits running EMT through joists, but in practical terms it is nearly impossible to take a straight 10-foot piece of EMT and pass it through 16", 18" or 24" spacing of your joists.

It is permitted to notch wall studs so you can run pipe flush, but if you notch joists you will weaken them, and this may not be permitted. In any case it is unwise.

You are permitted to run EMT along the bottoms of your joists, but that doesn't work if you plan to install drywall on the joists. Somebody in the Chicago area must have a creative way to run pipe perpendicular to joists that will be used for ceilings.

Juice
 
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Old 04-26-05, 10:10 AM
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Originally Posted by latuszek
Thanks for the great responses. I guess running the conduit will take some creativity no matter how much i research before hand.

One of my biggest questions is how to run conduit perpendicular to joists. an electrician told me that you basically can't run it through the joists. so i guess the only other option is to run as much as possible in the unfinished part of the basement, and whatever else runs perpendicular to joists where i am finishing, has to be run under the joists and i have to frame it in.
Cut and couple!! You'll have to install short sections of emt through the holes and use a coupling to join them. You can get a 'how to pamphlet' written by the conduit bender's manufacturer at an electrical parts house.

FYI. NEC 2002 Article 358.30(B) Supports. Horizontal runs of EMT supported by openings through framing members at intervals not greater than 3 m (10 ft) and securely fastened within 900 mm (3 ft) of termination points shall be permitted.

Translation. The studs will act as the conduit supports.

http://www.gardnerbender.com/whats_n...np_Bigben.html

Here's a pretty good guide:

http://www.elliottelectric.com/1051/...uitbending.asp
 

Last edited by thinman; 04-27-05 at 04:50 AM.
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